<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>400 Bad Request</title>
</head>
<style>
    body {
        font-family: Arial, sans-serif;
        background-color: #f0f0f0;
    }

    .container {
        width: 50%;
        margin: 0 auto;
        background-color: #fff;
        padding: 20px;
        border-radius: 5px;
        box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    }

    h2 {
        text-align: center;
        color: #333;
    }

    h3 {
        text-align: center;
        color: #c91d1d;
    }

    ul {
        list-style-type: none;
        padding: 0;
    }

    li {
        margin: 20px;
    }

    p {
        margin: 0;
    }

    button {
        display: block;
        width: 100%;
        padding: 10px;
        margin-top: 20px;
        background-color: #007bff;
        color: #fff;
        border: none;
        border-radius: 5px;
        cursor: pointer;
    }

    button:hover {
        background-color: #0056b3;
    }
</style>
<body >
<div class="container" >
<h1 align="center">用户信息修改失败</h1>
    <h3>用户已存在，修改失败</h3>
    <button>
        <a th:href="@{/userInformation}"><p align="center">返回</p></a>
    </button>

</div>
</body>

</html>